Question: Which voting round had the most abstentions?
Paraphrase: Which round of voting was the most abstentive?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q24097670 . ?ent wdt:P5043 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: Second round of French presidential election, 2017, 2018 Cypriot presidential election (First round), 2018 Cypriot presidential election (Second round), State elections in Acre in 2014 for Governor, second round, 2013 Cypriot presidential election (Second round)